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Power Macintosh 5260: Difference between revisions

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Red-link sweep: retarget delegation links to the pages that actually exist (LC 550/LC 580/Performa 6100 sub-pages do not, the Performa 550/580 and Power Macintosh 6100 ones do), fix the malformed 'Macintosh Power Macintosh 5400' title, and de-link targets with no page
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{{Infobox computer
{{Infobox computer
| name        = Power Macintosh 5260
| name        = Power Macintosh 5260
| image        = [[File:PowerMacintosh_5260.jpg]]
| image        = [[File:PowerMacintosh_5260.jpg|260px|frameless]]
| caption      = Power Macintosh 5260
| caption      = Macintosh Performa 5260/120, the consumer version, in the same case. Photo: Stephen Edmonds, Wikimedia Commons, CC BY-SA 2.5
| manufacturer = Apple Computer, Inc.
| manufacturer = Apple Computer, Inc.
| type        = All-in-one Personal Computer
| type        = All-in-one desktop personal computer
| release date = March 10, 1996
| release_date = April 15, 1996 (5260/100); October 1, 1996 (5260/120)
| discontinued = March 1, 1997
| discontinued = March 1, 1997 (EveryMac)
| price        = Education only (North America)
| cpu          = PowerPC 603e at 100 or 120 MHz; 40 MHz bus
| cpu          = PowerPC 603e @ 100–120 MHz
| memory      = 16 MB, expandable to 64 MB (two 72-pin SIMMs)
| memory      = 16 MB RAM (expandable to 64 MB)
| rom          = 4 MB
| storage      = 800 MB–1.2 GB IDE hard drive, 1.44 MB floppy, 4X–8X CD-ROM
| storage      = 800 MB, 1.2 GB or 1.6 GB IDE hard drive; 4× or 8× CD-ROM; 1.4 MB floppy (manual insert)
| display      = Built-in 14" shadow mask CRT (640×480)
| display      = Built-in 14-inch shadow-mask CRT; 640 × 480 at 16-bit
| sound        = 16-bit stereo output; mono sound input
| sound        = 16-bit stereo output, 16-bit mono input
| dimensions  = 17.5" H × 16.0" W × 15.1" D (445 × 406 × 383 mm)
| dimensions  = 445 × 406 × 383 mm (17.5 × 16 × 15.1 in)
| weight      = 17 lb without CD-ROM, 19 lb with CD-ROM (Apple)
| weight      = 45 lb (20.4 kg)
| os          = Mac OS 7.5.3 – 9.1
| os          = System 7.5.3; supported to Mac OS 9
| predecessor  = Power Macintosh 5200
| predecessor  = [[Power Macintosh 5200 LC]]
| successor    = [[Power Macintosh 5400]]
| successor    = [[Power Macintosh 5400]]
| codename    =
| model        = M3457
| model        = M3457
}}
}}
The '''Power Macintosh 5260''' is an all-in-one personal computer introduced by Apple Computer on March 10, 1996.<ref>{{cite web |url=https://everymac.com/systems/apple/powermac/specs/powermac_5260_100.html |title=Power Macintosh 5260/100 Specs |publisher=EveryMac.com |access-date=2026-02-10}}</ref> It features a PowerPC 603e processor and a built-in 14" shadow mask color CRT display in a compact all-in-one case. In North America, the Power Macintosh 5260 was sold exclusively to the educational market, while the consumer version was branded as the [[Macintosh Performa 5260CD|Performa 5260CD]].
The '''Power Macintosh 5260''' is an all-in-one Macintosh with a PowerPC 603e processor and a built-in 14-inch monitor. Apple introduced the 100 MHz Power Macintosh 5260/100 on April 15, 1996 and the 120 MHz 5260/120 on October 1, 1996.<ref name="apple100">Apple, [https://support.apple.com/en-us/112110 "Power Macintosh 5260/100: Technical Specifications"].</ref><ref name="apple120">Apple, [https://support.apple.com/en-us/112107 "Power Macintosh 5260/120: Technical Specifications"].</ref> EveryMac gives March 10, 1996 and September 19, 1996 as the introduction dates, and says the Power Macintosh 5260 was sold only to education buyers in North America, while the same machine was sold to consumers as the [[Macintosh Performa 5260CD]] and Performa 5260/120.<ref name="em100">EveryMac, [https://everymac.com/systems/apple/powermac/specs/powermac_5260_100.html "Power Macintosh 5260/100 Specs"].</ref><ref name="em120">EveryMac, [https://everymac.com/systems/apple/powermac/specs/powermac_5260_120.html "Power Macintosh 5260/120 Specs"].</ref> Apple's service manual says the Power Macintosh 5260/120 was sold in the United States and Canada, the [[Macintosh Performa 5260|Performa 5260/120]] in Canada and Australia, and the otherwise similar [[Macintosh Performa 5280|Performa 5280]] in Japan.<ref name="ss5260">Apple Computer, ''Service Source: Power Macintosh/Performa 5260, 5280 Series'' (1997), [[:File:Powermac.perf 5260.5280.pdf]]; see [[Power Macintosh/Performa 5260, 5280 Series Service Source]]. Page numbers are PDF pages.</ref>
 
== Model Variants ==


The Power Macintosh 5260 was available in two processor configurations:
The 5260 replaced the [[Power Macintosh 5200 LC]] and looks the same from outside, but it has its own logic board, power supply, analogue board and a 14-inch tube in place of the 5200's 15-inch one. Apple wrote a separate service manual for it, and the 5200/5300 manual is titled "(not 5260, 5280)" on its cover.<ref name="ss5260" /><ref name="ss52">Apple Computer, ''Service Source: Power Macintosh/Performa 5200 and 5300 (not 5260, 5280)'' (1997), [[:File:Powermac.perf 5200.5300.pdf]]; cover (p. 1), Specifications pp. 40 and 47. Page numbers are PDF pages.</ref>


{| class="wikitable" style="width:70%;"
== Models ==
|-
{| class="wikitable styled-table" style="width:70%; text-align:center;"
! Model !! Order Number !! Release !! Processor !! Standard RAM !! Hard Drive !! CD-ROM !! Market
|+ '''Power Macintosh 5260 configurations'''
! Model !! Introduced (Apple) !! Introduced / discontinued (EveryMac) !! Order number (EveryMac) !! Processor !! RAM !! Hard drive !! CD-ROM
|-
|-
| 5260/100 || M4982LL/A || March 1996 || 100 MHz || 8–16 MB || 800 MB || 4X || Education (NA), Consumer (Asia/Australia)
| 5260/100 || April 15, 1996<ref name="apple100" /> || March 10, 1996 / December 1, 1996<ref name="em100" /> || M4982LL/A || 100 MHz || 16 MB (Apple); 8 or 16 MB (EveryMac) || 800 MB || 4× (AppleCD 600i)
|-
|-
| 5260/120 || M5233LL/A || September 1996 || 120 MHz || 16 MB || 1.2 GB || 8X || Education only
| 5260/120 || October 1, 1996<ref name="apple120" /> || September 19, 1996 / March 1, 1997<ref name="em120" /> || M5233LL/A || 120 MHz || 16 MB || 1.2 GB || 8× (AppleCD 1200i)
|}
|}
Drive models are from Apple's service manual (p. 30); the manual also lists a 1.6 GB drive.<ref name="ss5260" /> Apple's specification pages give 16 MB as the minimum for both models, as does the Specifications chapter of the service manual (p. 29), but the manual's model overview lists "16 MB of DRAM minimum" as one of the ways the 5260/120 differs from the 5260/100 (p. 4).<ref name="apple100" /><ref name="ss5260" /> Apple's developer note for the 5260 gives 8 MB installed in a SIMM slot (Table 1-1, p. 3).<ref name="dn5260">Apple Computer, ''Developer Note: Power Macintosh 5260 Computer'' (1996), Table 1-1, printed p. 3. Hosted as [[:File:Power Macintosh 5260 Computer Developer Note (1996).pdf]].</ref>


=== Related Models ===
== Hardware ==
* '''Performa 5260CD:''' Consumer version with bundled software
{| class="wikitable styled-table" style="width:70%;"
* '''Performa 5260/120:''' Consumer version of the 120 MHz model
|+ '''Apple's figures for the Power Macintosh 5260'''
 
! Item !! Figure
== Architecture and Processor ==
|-
 
| Processor || PowerPC 603e at 100 MHz (5260/100) or 120 MHz (5260/120); integrated FPU and PMMU; 32 KB level-1 cache; 64-bit data path, 40 MHz bus
The Power Macintosh 5260 uses the PowerPC 603e processor, a low-power variant designed for cost-effective and all-in-one systems.<ref>{{cite web |url=https://everymac.com/systems/apple/powermac/specs/powermac_5260_120.html |title=Power Macintosh 5260/120 Specs |publisher=EveryMac.com |access-date=2026-02-10}}</ref>
|-
 
| RAM || 16 MB minimum; two 72-pin SIMM sockets, 80 ns or faster, fitted singly; 64 MB maximum
=== Processor Specifications ===
* '''Processor:''' PowerPC 603e
* '''Clock Speed:''' 100 MHz or 120 MHz
* '''Architecture:''' 32-bit processor with 64-bit data path
* '''FPU:''' Integrated
* '''System Bus:''' 40 MHz
 
=== Cache Configuration ===
* '''L1 Cache:''' 32 KB (on-die)
* '''L2 Cache:''' 256 KB (optional)
 
=== ROM ===
* '''ROM Size:''' 4 MB
* '''ROM Type:''' Macintosh ROM
 
== Memory and Storage ==
 
=== RAM Configuration ===
* '''RAM Type:''' 72-pin SIMM (80 ns minimum)
* '''RAM Slots:''' 2
* '''Standard RAM:''' 8–16 MB (varies by configuration)
* '''Maximum RAM:''' 64 MB
* '''Interleaving:''' Not supported
 
=== Storage Systems ===
* '''Hard Drive:''' 800 MB or 1.2 GB IDE
* '''Hard Drive Interface:''' IDE
* '''Floppy Drive:''' 1.44 MB 3.5" (manual eject)
* '''CD-ROM:''' 4X or 8X (varies by configuration)
 
== Display and Graphics ==
 
The Power Macintosh 5260 features an integrated 14" shadow mask CRT display with dedicated video memory shared from system RAM.
 
=== Display Specifications ===
* '''Display Size:''' 14" diagonal
* '''Display Type:''' Shadow mask RGB CRT
* '''Resolution:''' 640×480
* '''Color Depth:''' 16-bit (thousands of colors)
* '''Video RAM:''' 1 MB (from system RAM)
* '''External Monitor:''' Supported via LC PDS video card
 
== Audio Capabilities ==
 
* '''Audio Output:''' Stereo 16-bit
* '''Audio Input:''' Mono 16-bit
* '''Built-in Speakers:''' Yes
 
== Input/Output and Expansion ==
 
=== Port Configuration ===
* '''Serial Ports:''' 2 (printer and modem)
* '''ADB Ports:''' 1× Apple Desktop Bus
* '''Audio:''' Stereo out, mono in
* '''Video Out:''' Optional (via LC PDS card)
 
=== Expansion Slots ===
* '''LC PDS Slot:''' 1
* '''Comm Slot:''' 1
* '''Video Input Slot:''' 1
* '''Video Output Slot:''' 1
* '''TV Tuner Slot:''' 1
 
=== Networking ===
* '''Ethernet:''' 10Base-T available as optional upgrade
 
== General Maintenance ==
 
For detailed maintenance practices including cleaning, PRAM battery management, connector corrosion prevention, and CRT safety procedures, refer to the dedicated [[Power Macintosh 5260 General Maintenance]] page.
 
== Troubleshooting ==
 
A comprehensive troubleshooting guide addressing common issues such as power problems, startup failures, and video issues is available on the [[Power Macintosh 5260 Troubleshooting]] page.
 
== Capacitor Replacement Guide ==
 
Detailed capacitor replacement guidelines can be found on the [[Power Macintosh 5260 Capacitor Replacement Guide]] page.
 
== Specifications ==
 
Full technical specifications are available on the [[Power Macintosh 5260 Specifications]] page.
 
== Technical Details ==
 
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=== System Architecture at a Glance ===
{| class="wikitable styled-table" style="width:90%; text-align:center;"
! Sub-system !! Specification (Power Macintosh 5260, 1996–1997)
|-
|-
| '''CPU''' || PowerPC 603e @ 100–120 MHz
| ROM || 4 MB
|-
|-
| '''Bus width''' || 32-bit processor, 64-bit data path
| Level-2 cache || 256 KB on a card in its own slot on the logic board; Apple's specification pages list it as standard on the 5260/100 and optional on the 5260/120
|-
|-
| '''System Bus''' || 40 MHz
| Video || 1 MB DRAM frame buffer on the logic board; 640 × 480 at 16-bit
|-
|-
| '''ROM''' || 4 MB
| Display || 14-inch shadow-mask CRT, 12.8-inch viewable; 0.28 mm dot pitch; 66.7 Hz; active raster 240 × 185 mm; 9,300 K white point
|-
|-
| '''RAM''' || 8–16 MB standard (64 MB max)
| Storage || IDE hard drive (800 MB, 1.2 GB or 1.6 GB); tray-loading CD-ROM on the internal SCSI bus (ID 3); 1.4 MB SuperDrive, manual insert
|-
|-
| '''Display''' || Built-in 14" CRT, 640×480 @ 16-bit
| Ports || One ADB; two serial (mini DIN-8, LocalTalk); external SCSI (DB-25, up to seven devices); sound input; front headphone jack and rear stereo output
|-
|-
| '''Video''' || 1 MB shared RAM
| Expansion || LC processor-direct slot (96/114-pin); 112-pin communications slot for a modem or Ethernet card; 60-pin video-in slot; 10-pin TV tuner connector; 22-pin external video connector slot
|-
|-
| '''Sound''' || Stereo 16-bit output, mono input
| Sound || 16-bit stereo output, 16-bit mono input; records at 11 or 22 kHz, plays at 22 kHz
|-
|-
| '''Storage''' || 800 MB–1.2 GB IDE, 4X–8X CD-ROM
| Electrical || 100–240 V AC, 47–63 Hz; 240 W maximum; 4.0 A maximum; 40 A peak inrush
|-
|-
| '''Expansion''' || LC PDS, Comm, Video I/O, TV
| PRAM battery || 4.5 V alkaline pack on a plug and hook-and-loop base; replace below 3.0 V
|}
|}
Sources: service manual pp. 9–11, 19, 28–43, 65, 171, 174–177;<ref name="ss5260" /> processor, bus, cache, RAM grouping and battery type from Apple's specification pages.<ref name="apple100" /><ref name="apple120" />
The processor-direct slot takes many cards made for the [[Macintosh LC]] family, but Apple says it is not a true PDS: cards that work with the main processor, such as cache or FPU cards, do not work in it (p. 11).<ref name="ss5260" /> The external video connector is an optional module that mirrors the built-in screen on a second monitor; it cannot drive a separate desktop (pp. 19, 32).<ref name="ss5260" /> EveryMac says a second display can be driven through an LC PDS video card.<ref name="em100" />
EveryMac says that 1 MB of system RAM is dedicated to video. Apple's specification pages and service manual give a separate 1 MB of DRAM on the logic board for the frame buffer.<ref name="em100" /><ref name="apple100" /><ref name="ss5260" />


== Service documentation ==
=== Where Apple's documents disagree ===
* Power: the service manual gives 240 W maximum, 4.0 A, and in the same table "220 W maximum for all line and load conditions" (p. 42). Apple's specification pages give 125 W and 4 A.<ref name="ss5260" /><ref name="apple100" />
* Weight: the specification pages give 45 lb. The service manual prints 17 lb without CD-ROM and "19 lb. (21.15 kg)" with it (p. 43); 21.15 kg is about 46.6 lb, close to the specification-page figure.<ref name="ss5260" /><ref name="apple120" />
* Dimensions: the service manual gives 16 in wide and 15.1 in deep (p. 43); the specification pages give 15.1 in wide and 16 in deep.<ref name="ss5260" /><ref name="apple100" />


Apple wrote a '''separate service manual''' for this machine, hosted here as
== Known faults ==
[[Power Macintosh/Performa 5260, 5280 Series Service Source]]. The ''Power Macintosh/Performa 5200
These come from Apple's symptom charts for the 5260 and 5280.<ref name="ss5260" />
and 5300'' volume carries the qualifier '''"(not 5260, 5280)"''' on its own cover, so 5200 figures
* A 5260/100 with the 1.6 GB ATA drive (661-1107) that shows a flashing question mark at startup, sometimes cleared by a restart: Apple says to replace the drive if its serial number is in the range XXX6 0 9 9 XXXXX to XXX6 1 3 1 XXXXX (p. 63).
should not be read across.
* A computer that will not start from the keyboard but starts from the rear power switch, or restarts after Shut Down: after checking the keyboard, Apple's cure is a new analogue board (p. 49).
* A rattling noise at startup with the Apple External Video Connector fitted: the external video cable is touching the fan blades and should be pressed or folded out of the way (p. 71).
* Crackling from sounds other than system beeps: if the static changes with the Sound control panel volume, install Audio Volume Extension 1.1 or later; otherwise the logic board (p. 52).
* MPEG card faults: distorted sound needs the modified MPEG board, identified by a jumper from U5 pin 2 to D1 pin 1 (p. 51); video that will not play needs a card whose U12 is marked 341S0205, printed "341SO205" in the manual (p. 54).


Apple gives '''16 MB of DRAM minimum''' expandable to 64 MB, '''4 MB of ROM''', a '''256K level-2
See [[Power Macintosh 5260 Troubleshooting]] for the full charts.
cache''', a 64-bit PowerPC bus, and a supply of '''100–240 VAC''' at 47–63 Hz rated '''240 W
maximum''' and '''4.0 A maximum''' for all line and load conditions, with a '''40 A peak inrush'''.
The PRAM cell threshold is '''replace below 3.0 V'''.<ref name="sspowermacintoshpe">Apple Computer, ''Power Macintosh/Performa 5260, 5280 Series'', Service Source, 216 pp, PDF distilled 25 April 1997. Hosted here as the wiki page linked above ([[:File:powermac.perf_5260.5280.pdf]]). Specifications chapter, and Additional Procedures — Battery Verification where a threshold is quoted.</ref>


The 240 W / 4.0 A rating is nearly double the 125 W / 2.5 A of the 5200, 5300 and 5400 volumes, which
== Adjustments ==
is one more reason not to treat these as the same machine.<ref name="sspowermacintoshpe" />
Apple's adjustments for the 5260 and 5280 are light meter setup, geometry, video and power supply (pp. 184–214). The power-supply adjustment must be done whenever the analogue board or power supply has been taken out: connect a DC voltmeter between the metal chassis and pin 3 of P805 on the power supply, and set R828 for 110 V DC (pp. 213–214).<ref name="ss5260" /> The 5200 and 5300 high-voltage adjustment (29.5 V at D713 or D703) is marked "not for 5260, 5280" and does not apply.<ref name="ss52" />


== See Also ==
'''The power supply and analogue board carry mains and CRT voltages, and the power-supply adjustment is made with the machine running. Discharge the CRT before working near it; see [[CRT Discharge Procedure]].'''


* Power Macintosh 5200
== Maintenance and repair ==
* [[Power Macintosh 5400]]
* [[Power Macintosh 5260 General Maintenance]]: access, SIMMs, battery, resets and the adjustment controls
* [[Macintosh Performa 5260CD]]
* [[Power Macintosh 5260 Troubleshooting]]: Apple's symptom charts
* [[Power Macintosh 5260 Capacitor Replacement Guide]]: board part numbers and what to check after a recap
* [[Power Macintosh 5260 Specifications]]: the full specification tables from the service manual


== Apple service data ==
== Service documentation ==
Apple's ''Power Macintosh/Performa 5260, 5280 Series'' Service Source (216 pages) covers the Power Macintosh 5260/100 and 5260/120 and the international Performa 5260/120 and 5280. It is module-level: take-apart, symptom charts, adjustments and an exploded view with part numbers, but no schematics.<ref name="ss5260" />


Apple's own figures for the 5260/5280, from the Service Source volume hosted on this wiki.<ref name="ss5260">Apple Computer, ''Power Macintosh/Performa 5260, 5280 Series'', Service Source. Hosted here as [[Power Macintosh/Performa 5260, 5280 Series Service Source]] ([[:File:Powermac.perf_5260.5280.pdf]]). Specifications and Additional Procedures &mdash; Battery Verification chapters.</ref>
<pdf width="800" height="500">File:Powermac.perf_5260.5280.pdf</pdf>


<templatestyles src="Template:StyledTable/styles.css" />
Apple's owner's manual, the ''Power Macintosh User's Manual'' for Power Macintosh 5260 series computers (1996), covers setup, troubleshooting and reinstalling software, and its Appendix B shows how to open the computer and fit LC-PDS and communication cards, SIMMs and the level-2 cache module (pp. 133–149).<ref name="ug5260">Apple Computer, ''Power Macintosh User's Manual: for Power Macintosh 5260 series computers'' (1996), Appendix B (pp. 133–149) and Appendix D, Technical Information (pp. 159–166), printed page numbers. Hosted as [[:File:Power Macintosh 5260 Series User's Manual.pdf]].</ref> Its technical appendix gives a 12 MB minimum and 70 ns SIMMs, which differ from the service manual.<ref name="ug5260" /> Download: [[:File:Power Macintosh 5260 Series User's Manual.pdf|Power Macintosh 5260 Series User's Manual.pdf]].
{| class="wikitable styled-table" style="width:90%;"
! Item !! Apple's figure
|-
| Line voltage || 100–240 VAC, 47–63 Hz
|-
| Power || '''240 W maximum'''; 4.0 A maximum and 220 W maximum for all line and load conditions
|-
| Case || Height 17.5 in. (445 mm), '''width 16 in. (406 mm)''', '''depth 15.1 in. (383 mm)'''
|-
| Weight || Without CD-ROM 17 lb.; with CD-ROM 19 lb.
|-
| PRAM battery || Verify on the 10 V DC scale; '''replace below 3.0 V'''
|}


The 5260/5280 supply is '''240 W at 4.0 A''' against the 5200/5300's 125 W at 2.5 A in a chassis that
Apple's developer note for the machine describes its architecture, I/O and expansion slots for card designers, with mechanical drawings of the I/O expansion cards: [[:File:Power Macintosh 5260 Computer Developer Note (1996).pdf|Power Macintosh 5260 Computer Developer Note (1996).pdf]].<ref name="dn5260" />
looks the same, so the two are not interchangeable; the 5260/5280 also use a '''14-inch''' tube where the
* [[Power Macintosh 5260 Computer Developer Note]]
5200/5300 use a 15-inch one. Apple's metric weight in this volume is printed as "19 lb. (21.15 kg)",
* [[Power Macintosh 5260 Series User's Manual]]
which is wrong &mdash; 19 lb is 8.6 kg &mdash; so only the pounds figures are used here.<ref name="ss5260" />


Apple's High Voltage adjustment for the 5200/5300 (29.5 V DC ± 0.1 V at the cathode of D713 or D703,
== Related pages ==
set with VR501 or VR702) is marked '''"not for 5260, 5280"''' on every page, and there is no
* [[Power Macintosh 5200 LC]]
rail-voltage adjustment or tolerance table for this machine.<ref name="ss5260" />
* [[Power Macintosh 5400]]
* [[Macintosh Performa 5260]]
* [[Macintosh Performa 5260CD]]
* [[Macintosh Performa 5280]]


== References ==
== References ==
<references />
<references />


[[Category:Apple Vintage Computers]]
[[Category:Apple Vintage Computers]]
{{Navbox-AppleVintage|state=collapsed}}

Latest revision as of 20:28, 1 October 2026

Power Macintosh 5260
Macintosh Performa 5260/120, the consumer version, in the same case. Photo: Stephen Edmonds, Wikimedia Commons, CC BY-SA 2.5
Specifications
ManufacturerApple Computer, Inc.
TypeAll-in-one desktop personal computer
ReleasedApril 15, 1996 (5260/100); October 1, 1996 (5260/120)
DiscontinuedMarch 1, 1997 (EveryMac)
CPUPowerPC 603e at 100 or 120 MHz; 40 MHz bus
Memory16 MB, expandable to 64 MB (two 72-pin SIMMs)
Storage800 MB, 1.2 GB or 1.6 GB IDE hard drive; 4× or 8× CD-ROM; 1.4 MB floppy (manual insert)
DisplayBuilt-in 14-inch shadow-mask CRT; 640 × 480 at 16-bit
Sound16-bit stereo output, 16-bit mono input
ROM4 MB
Dimensions445 × 406 × 383 mm (17.5 × 16 × 15.1 in)
Weight45 lb (20.4 kg)
OS / FirmwareSystem 7.5.3; supported to Mac OS 9
PredecessorPower Macintosh 5200 LC
SuccessorPower Macintosh 5400
Model no.M3457

The Power Macintosh 5260 is an all-in-one Macintosh with a PowerPC 603e processor and a built-in 14-inch monitor. Apple introduced the 100 MHz Power Macintosh 5260/100 on April 15, 1996 and the 120 MHz 5260/120 on October 1, 1996.[1][2] EveryMac gives March 10, 1996 and September 19, 1996 as the introduction dates, and says the Power Macintosh 5260 was sold only to education buyers in North America, while the same machine was sold to consumers as the Macintosh Performa 5260CD and Performa 5260/120.[3][4] Apple's service manual says the Power Macintosh 5260/120 was sold in the United States and Canada, the Performa 5260/120 in Canada and Australia, and the otherwise similar Performa 5280 in Japan.[5]

The 5260 replaced the Power Macintosh 5200 LC and looks the same from outside, but it has its own logic board, power supply, analogue board and a 14-inch tube in place of the 5200's 15-inch one. Apple wrote a separate service manual for it, and the 5200/5300 manual is titled "(not 5260, 5280)" on its cover.[5][6]

Models

[edit | edit source]
Power Macintosh 5260 configurations
Model Introduced (Apple) Introduced / discontinued (EveryMac) Order number (EveryMac) Processor RAM Hard drive CD-ROM
5260/100 April 15, 1996[1] March 10, 1996 / December 1, 1996[3] M4982LL/A 100 MHz 16 MB (Apple); 8 or 16 MB (EveryMac) 800 MB 4× (AppleCD 600i)
5260/120 October 1, 1996[2] September 19, 1996 / March 1, 1997[4] M5233LL/A 120 MHz 16 MB 1.2 GB 8× (AppleCD 1200i)

Drive models are from Apple's service manual (p. 30); the manual also lists a 1.6 GB drive.[5] Apple's specification pages give 16 MB as the minimum for both models, as does the Specifications chapter of the service manual (p. 29), but the manual's model overview lists "16 MB of DRAM minimum" as one of the ways the 5260/120 differs from the 5260/100 (p. 4).[1][5] Apple's developer note for the 5260 gives 8 MB installed in a SIMM slot (Table 1-1, p. 3).[7]

Hardware

[edit | edit source]
Apple's figures for the Power Macintosh 5260
Item Figure
Processor PowerPC 603e at 100 MHz (5260/100) or 120 MHz (5260/120); integrated FPU and PMMU; 32 KB level-1 cache; 64-bit data path, 40 MHz bus
RAM 16 MB minimum; two 72-pin SIMM sockets, 80 ns or faster, fitted singly; 64 MB maximum
ROM 4 MB
Level-2 cache 256 KB on a card in its own slot on the logic board; Apple's specification pages list it as standard on the 5260/100 and optional on the 5260/120
Video 1 MB DRAM frame buffer on the logic board; 640 × 480 at 16-bit
Display 14-inch shadow-mask CRT, 12.8-inch viewable; 0.28 mm dot pitch; 66.7 Hz; active raster 240 × 185 mm; 9,300 K white point
Storage IDE hard drive (800 MB, 1.2 GB or 1.6 GB); tray-loading CD-ROM on the internal SCSI bus (ID 3); 1.4 MB SuperDrive, manual insert
Ports One ADB; two serial (mini DIN-8, LocalTalk); external SCSI (DB-25, up to seven devices); sound input; front headphone jack and rear stereo output
Expansion LC processor-direct slot (96/114-pin); 112-pin communications slot for a modem or Ethernet card; 60-pin video-in slot; 10-pin TV tuner connector; 22-pin external video connector slot
Sound 16-bit stereo output, 16-bit mono input; records at 11 or 22 kHz, plays at 22 kHz
Electrical 100–240 V AC, 47–63 Hz; 240 W maximum; 4.0 A maximum; 40 A peak inrush
PRAM battery 4.5 V alkaline pack on a plug and hook-and-loop base; replace below 3.0 V

Sources: service manual pp. 9–11, 19, 28–43, 65, 171, 174–177;[5] processor, bus, cache, RAM grouping and battery type from Apple's specification pages.[1][2]

The processor-direct slot takes many cards made for the Macintosh LC family, but Apple says it is not a true PDS: cards that work with the main processor, such as cache or FPU cards, do not work in it (p. 11).[5] The external video connector is an optional module that mirrors the built-in screen on a second monitor; it cannot drive a separate desktop (pp. 19, 32).[5] EveryMac says a second display can be driven through an LC PDS video card.[3]

EveryMac says that 1 MB of system RAM is dedicated to video. Apple's specification pages and service manual give a separate 1 MB of DRAM on the logic board for the frame buffer.[3][1][5]

Where Apple's documents disagree

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  • Power: the service manual gives 240 W maximum, 4.0 A, and in the same table "220 W maximum for all line and load conditions" (p. 42). Apple's specification pages give 125 W and 4 A.[5][1]
  • Weight: the specification pages give 45 lb. The service manual prints 17 lb without CD-ROM and "19 lb. (21.15 kg)" with it (p. 43); 21.15 kg is about 46.6 lb, close to the specification-page figure.[5][2]
  • Dimensions: the service manual gives 16 in wide and 15.1 in deep (p. 43); the specification pages give 15.1 in wide and 16 in deep.[5][1]

Known faults

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These come from Apple's symptom charts for the 5260 and 5280.[5]

  • A 5260/100 with the 1.6 GB ATA drive (661-1107) that shows a flashing question mark at startup, sometimes cleared by a restart: Apple says to replace the drive if its serial number is in the range XXX6 0 9 9 XXXXX to XXX6 1 3 1 XXXXX (p. 63).
  • A computer that will not start from the keyboard but starts from the rear power switch, or restarts after Shut Down: after checking the keyboard, Apple's cure is a new analogue board (p. 49).
  • A rattling noise at startup with the Apple External Video Connector fitted: the external video cable is touching the fan blades and should be pressed or folded out of the way (p. 71).
  • Crackling from sounds other than system beeps: if the static changes with the Sound control panel volume, install Audio Volume Extension 1.1 or later; otherwise the logic board (p. 52).
  • MPEG card faults: distorted sound needs the modified MPEG board, identified by a jumper from U5 pin 2 to D1 pin 1 (p. 51); video that will not play needs a card whose U12 is marked 341S0205, printed "341SO205" in the manual (p. 54).

See Power Macintosh 5260 Troubleshooting for the full charts.

Adjustments

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Apple's adjustments for the 5260 and 5280 are light meter setup, geometry, video and power supply (pp. 184–214). The power-supply adjustment must be done whenever the analogue board or power supply has been taken out: connect a DC voltmeter between the metal chassis and pin 3 of P805 on the power supply, and set R828 for 110 V DC (pp. 213–214).[5] The 5200 and 5300 high-voltage adjustment (29.5 V at D713 or D703) is marked "not for 5260, 5280" and does not apply.[6]

The power supply and analogue board carry mains and CRT voltages, and the power-supply adjustment is made with the machine running. Discharge the CRT before working near it; see CRT Discharge Procedure.

Maintenance and repair

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Service documentation

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Apple's Power Macintosh/Performa 5260, 5280 Series Service Source (216 pages) covers the Power Macintosh 5260/100 and 5260/120 and the international Performa 5260/120 and 5280. It is module-level: take-apart, symptom charts, adjustments and an exploded view with part numbers, but no schematics.[5]

Apple's owner's manual, the Power Macintosh User's Manual for Power Macintosh 5260 series computers (1996), covers setup, troubleshooting and reinstalling software, and its Appendix B shows how to open the computer and fit LC-PDS and communication cards, SIMMs and the level-2 cache module (pp. 133–149).[8] Its technical appendix gives a 12 MB minimum and 70 ns SIMMs, which differ from the service manual.[8] Download: Power Macintosh 5260 Series User's Manual.pdf.

Apple's developer note for the machine describes its architecture, I/O and expansion slots for card designers, with mechanical drawings of the I/O expansion cards: Power Macintosh 5260 Computer Developer Note (1996).pdf.[7]

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References

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  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Apple, "Power Macintosh 5260/100: Technical Specifications".
  2. ↑ 2.0 2.1 2.2 2.3 Apple, "Power Macintosh 5260/120: Technical Specifications".
  3. ↑ 3.0 3.1 3.2 3.3 EveryMac, "Power Macintosh 5260/100 Specs".
  4. ↑ 4.0 4.1 EveryMac, "Power Macintosh 5260/120 Specs".
  5. ↑ 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 5.11 5.12 5.13 Apple Computer, Service Source: Power Macintosh/Performa 5260, 5280 Series (1997), File:Powermac.perf 5260.5280.pdf; see Power Macintosh/Performa 5260, 5280 Series Service Source. Page numbers are PDF pages.
  6. ↑ 6.0 6.1 Apple Computer, Service Source: Power Macintosh/Performa 5200 and 5300 (not 5260, 5280) (1997), File:Powermac.perf 5200.5300.pdf; cover (p. 1), Specifications pp. 40 and 47. Page numbers are PDF pages.
  7. ↑ 7.0 7.1 Apple Computer, Developer Note: Power Macintosh 5260 Computer (1996), Table 1-1, printed p. 3. Hosted as File:Power Macintosh 5260 Computer Developer Note (1996).pdf.
  8. ↑ 8.0 8.1 Apple Computer, Power Macintosh User's Manual: for Power Macintosh 5260 series computers (1996), Appendix B (pp. 133–149) and Appendix D, Technical Information (pp. 159–166), printed page numbers. Hosted as File:Power Macintosh 5260 Series User's Manual.pdf.